Rivers of London: Here Be Dragons #2

Co-written by New York Times bestselling author, James Swallow! Some say a dangerous monster is at large above the streets of London. A monster red in tooth and claw, with wings, and fire for breath. And its name… Wyvern! After a rash of strange UFO sightings above the capital, a Met Police helicopter night patrol is attacked by what can only be described as a dragon. Wizard in training Peter Grant, and his mentor, Thomas Nightingale, the Met’s only sanctioned wizard, takes to the skies to investigate.